An investigation into the energy transfer efficiency of a two-pigment photosynthetic system using a macroscopic quantum model. (November 2020)

• Record Type: Journal Article
• Authors: Ghasemi, Fatemeh; Shafiee, Afshin
• Is Part Of: Bio systems. Volume 197(2020)
• Publication Date: 2020-11
• Subjects: Photosynthesis -- Energy transfer efficiency -- Quantum efficiency; Biological systems -- Periodicals; Biology -- Periodicals; Biology -- Periodicals; Evolution -- Periodicals; Biologie -- Périodiques; Évolution -- Périodiques; 570
• DOI: 10.1016/j.biosystems.2020.104209
• Languages: English
• ISSNs: 0303-2647

Abstract

Abstract: Despite several different measures of efficiency that are applicable to the photosynthetic systems, a precise degree of efficiency of these systems is not completely determined. Introducing an efficient model for the dynamics of light-harvesting complexes in biological environments is a major purpose in investigating such systems. Here, we investigate the effect of macroscopic quantum behavior of a system of two pigments on the transport phenomena in this system model which interacts with an oscillating environment. We use the second-order perturbation theory to calculate the time-dependent population of excitonic states of a two-dimensional Hamiltonian using a non-master equation approach. Our results demonstrate that the quantum efficiency is robust with respect to the macroscopicity parameter h ˜ solely, but the ratio of macroscopicity over the pigment-pigment interaction energy can be considered as a parameter that may control the energy transfer efficiency at a given time. So, the dynamical behavior and the quantum efficiency of the supposed photosynthetic system may be influenced by a change in the macroscopic behavior of the system.